Revert "Sokoban solver without freeze deadlock"

This reverts commit 4afd3a0c4301ae48a9c1a7964f203b5b088eae8f.
Revert "Revert "Sokoban solver without freeze deadlock""

This reverts commit 0b77db4d8c032c90d0fda3e4d86ff4752537a0f7.
new sokoban version
Merge branch 'master' of https://github.com/dimpavl/Sokoban_solver2_0